> Hello Gus> Will this help your scenario?> http://www.dbquotient.com/blogs/?page_id=9>> Kumar>> at 3:59 PM, Gus Spier <gus.spier_at_gmail.com> wrote:>>> Solaris 10>> Oracle 10.2.0.2>>>> The database' SAN suffered a mild catastrophe very early this morning.>> After the storage managers, sysadmins, and network types finally restored>> service, we found that the database would not open>>>> Review of the alert log highlights an ORA-600, [4194],[4],[7],[],[] ..>> Google search and MOS tell me that 4194 indicates that the redo block and>> undo block do not match. In this case, the undo is at block 4 and the redo>> is at block 7.>>>> Further examination of alert log and trc files indicate my file# 7, block>> 1777 is corrupt.>>>> We have tried simple recovery, data file recovery, building a new UNDO>> tablespace, but we still have an active rollback segment with a corrupt>> block.>>>> A Severity One SR has been opened with Oracle Support, and been elevated.>>>> We're still waiting for an update.>>>> has anybody any useful suggestions?>>>> v/r,>>>> Gus>>>>